Unexplained C++ default int values

Question

I\'ve been refactoring some code and I noticed some wonky behavior involving an uninitialized int array:

int arr[ARRAY_SIZE];

I set a break

Answer 1

thats a really dangerous assumption your making.

on a good compiler you might get a constant default value like the closest to -infinity(edit: or 0xCCCCCCCC thx acidezombie24), otherwise you'll just get random numbers

ALWAYS initialize your variables

something like

static const int mouseBufferSize = 10;
int mouseBufferX[mouseBufferSize];
memset(mouseBufferX,0,sizeof(mouseBufferX));
int mouseBufferY[mouseBufferSize];
memset(mouseBufferY,0,sizeof(mouseBufferY));